US11967877B2 - Rotating electric machine - Google Patents
Rotating electric machine Download PDFInfo
- Publication number
- US11967877B2 US11967877B2 US17/595,863 US201917595863A US11967877B2 US 11967877 B2 US11967877 B2 US 11967877B2 US 201917595863 A US201917595863 A US 201917595863A US 11967877 B2 US11967877 B2 US 11967877B2
- Authority
- US
- United States
- Prior art keywords
- frame
- electric machine
- rotating electric
- space
- intake port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
- 238000005192 partition Methods 0.000 claims abstract description 26
- 238000009423 ventilation Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000000112 cooling gas Substances 0.000 claims description 12
- 238000004804 winding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002826 coolant Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 235000010829 Prunus spinosa Nutrition 0.000 description 1
- 241001527975 Reynosia uncinata Species 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/42—Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
Definitions
- the present disclosure relates to a rotating electric machine.
- a cooling gas in the rotating electric machine is circulated by a fan attached to a rotor to cool a temperature increased part, and is cooled by a gas cooler.
- the magnetic metal near the stator winding is heated by a leakage magnetic flux, and therefore, for example, in Patent Document 1, the inner side of the bracket is covered by the shield plate which is a high-conductive metal plate so as to prevent overheating.
- the shield plate which is a high-conductive metal plate so as to prevent overheating.
- the present disclosure has been made to solve the above problem, and an object of the present disclosure is to provide a rotating electric machine in which a shield plate provided between a frame and a stator winding is forcibly cooled, thus enhancing a franc cooling effect and enabling size reduction.
- a rotating electric machine includes: a rotor having a columnar rotor core which is fixed to a shaft and generates a magnetic field; a stator provided so as to surround a circumference of the rotor core, end composed of a stator core end a coil wound through slots of the stator core; and a frame storing the stator and the rotor.
- a space in which a coil end portion of the coil extending in an axial direction front the stator core is surrounded by the frame and an axial-direction end surface of the stator core is defined as an end housing portion.
- the end housing portion is partitioned by a partition plate into a first space on a side where a cooler for cooling a coding gas circulating in the rotating electric machine is present, and a second space on a side where the coil end portion is present.
- the partition plate has, at a radially outer end, an intake port that opens in a circumferential direction.
- a shield plate which is a magnetically high-conductive metal plate is provided so as to be connected to a radially inner side from the intake port of the partition plate and arranged along the circumferential direction of the frame.
- a ventilation path is formed between the shield plate and the frame so as to communicate with the intake port.
- the shield plate provided between the frame and the stator winding is forcibly cooled, thus providing a rotating electric machine that has an enhanced frame cooling effect and a reduced size.
- FIG. 1 is a sectional view of a rotating electric machine according to embodiment 1.
- FIG. 2 is a specific part sectional view at one end in the axial direction of the rotating electric machine according to embodiment 1, taken along a direction perpendicular to the axial direction.
- FIG. 3 is a specific part enlarged view of a first partition wall according to embodiment 1, as seen in the circumferential direction shown in FIG. 2 .
- FIG. 4 is a schematic front view of a shield plate according to embodiment 1, as seen in the radial direction from the inside of the rotating electric machine.
- FIG. 5 is a view of a stay according to embodiment 1, is seen in a ventilation path direction in FIG. 2 .
- FIG. 1 is a sectional view of a rotating electric machine 100 according to embodiment 1.
- the rotating electric machine 100 includes a rotor 2 having a columnar rotor core 22 which is fixed to a shaft 21 and generates a magnetic field, and stator 3 provided so as to surround the circumference of the rotor core 22 .
- the stator 3 includes a cylindrical stator core 31 and a coil 32 wound through slots (not shown) of the stator core 31 .
- the rotor 2 and the stator 3 are stored in a frame 4 .
- the shaft 21 of the rotor 2 is rotatably supported by bearings 9 attached at both ends in the axial direction of the frame 4 .
- coil end portion 32 e a part extending in the axial direction from each axial-direction end surface of the stator core 31 is referred to as coil end portion 32 e .
- end housing portion 41 A space in which each coil end portion 32 e is surrounded by the frame 4 and the axial-direction end surface of the stator core 31 is referred to as end housing portion 41 .
- FIG. 2 is a specific part sectional view at one end in the axial direction of the rotating electric machine 100 , taken along a direction perpendicular to the axial direction A.
- the cross-section position is a part where the coil end portion 32 e is present.
- a cooler 6 is a device for cooling a cooling gas that circulates in the rotating electric machine 100 and cools the rotor 2 and the stator 3 , through heat exchange with the outside or the rotating electric machine 100 .
- the end housing portion 41 is partitioned by a partition plate 7 into a first space k 1 on the side where the cooler 6 is present and a second space k 2 on the side where the coil end portion 32 a of the stator 3 is present. That is, the first space k 1 and the second space, k 2 are surrounded by the partition plate 7 and the frame 4 .
- the partition plate 7 includes a first partition wall 7 a extending in the radial direction and a second partition wall 7 b extending in the circumferential direction.
- FIG. 3 is a specific part enlarged view of the first partition wall 7 a as seen in the circumferential direction B shown in FIG. 2 .
- the first partition wall 7 a has, at an outer end in the radial direction C of the rotating electric machine 100 shown in FIG. 2 , an intake port 7 ah that opens in the circumferential direction B, as shown in FIG. 3 . Through the intake port 7 ah , the cooling gas in the second space k 2 is sucked into the first space k 1 .
- FIG. 4 is a schematic front view of shield plates 8 a , 8 b , 8 c of the rotating electric machine 100 as seen in the radial direction C shown in FIG. 2 .
- the shield plates 8 a , 8 b , 8 c are provided so as to be connected to the radially inner side from the intake port 7 ah of the first partition wall 7 a and arranged in a predetermined range along the circumferential direction B at the frame 4 .
- the shield plates 8 a to 8 c are magnetically high-conductive metal plates.
- the shield plates 8 a to 8 c serve to reduce heat generation in the frame due to a leakage magnetic flux from the coil end portion 32 e , by means of heat generation in the shield plates 8 a to 8 c .
- the division number of the shield plates 8 a to 8 c is not limited.
- the shield plates 8 a to 8 c are attached by screws N to stays 7 as , 4 as , 4 bs , 4 cs attached to a surface on the second space k 2 side of the first partition wall 7 a and an inner circumferential surface of the frame 4 .
- FIG. 5 is a view of the stay 4 cs as seen in the direction of a ventilation ion path D in FIG. 2 .
- the stay 4 cs has three ventilation ports 4 csh that are arranged in the axial direction A and open in the circumferential direction.
- the stays 4 as and 4 bs also have similar ventilation ports.
- the ventilation path D is formed between the frame 4 and the shield plates 8 a to 8 c so as to communicate with the intake port 7 ah described above.
- the pressure of the cooling gas in the second space k 2 is denoted by ⁇ and the pressure of the cooling gas in the first space k 1 is denoted by ⁇
- the pressure of the coding gas is adjusted so as to satisfy ⁇ > ⁇ .
- the cooling gas in the second space k 2 flows from the ventilation port 4 csh to pass through the ventilation path D formed between the frame 4 and the shield plates 8 a to 8 c , and then is sucked to the first space k 1 side through the intake port 7 ah provided in the first partition wall 7 a , so that the cooling gas is cooled by the cooler 6 .
- the shield plates 8 a to 8 c have a high temperature as described above but are forcibly cooled by the cooling gas pausing through the ventilation path D.
- the cooling gas cooled through boat exchange with the outside toy the cooler 6 circulates again inside the rotating electric machine 100 , to take heat away from the stator 3 end the rotor 2 , thereby cooling them.
- the rotating electric machine according to embodiment 1 includes:
- the ventilation path is formed between the shield plate and the frame so as to communicate with the intake port for a cooling medium to a cooling device, whereby the shield plate is forcibly cooled.
- the shield plate can be assuredly fixed to the frame and also the ventilation path can be ensured.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2019/025931 WO2020261561A1 (ja) | 2019-06-28 | 2019-06-28 | 回転電機 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20220247262A1 US20220247262A1 (en) | 2022-08-04 |
US11967877B2 true US11967877B2 (en) | 2024-04-23 |
Family
ID=71523946
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/595,863 Active 2040-06-07 US11967877B2 (en) | 2019-06-28 | 2019-06-28 | Rotating electric machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US11967877B2 (ja) |
JP (1) | JP6725184B1 (ja) |
CN (1) | CN113994574A (ja) |
DE (1) | DE112019007504T5 (ja) |
WO (1) | WO2020261561A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11967877B2 (en) * | 2019-06-28 | 2024-04-23 | Mitsubishi Electric Corporation | Rotating electric machine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54139006A (en) | 1978-04-20 | 1979-10-29 | Toshiba Corp | Stator for rotary electric machine |
JPS558294A (en) | 1978-06-07 | 1980-01-21 | Gen Electric | Rotary electric machine |
JPS5937864A (ja) | 1982-08-26 | 1984-03-01 | Toshiba Corp | 回転電機 |
JP2016036234A (ja) | 2014-08-04 | 2016-03-17 | 株式会社東芝 | 回転電機 |
US20220247262A1 (en) * | 2019-06-28 | 2022-08-04 | Mitsubishi Electric Corporation | Rotating electric machine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54139005A (en) * | 1978-04-20 | 1979-10-29 | Toshiba Corp | Stator for rotary electric machine |
JPH06141504A (ja) * | 1992-10-26 | 1994-05-20 | Fuji Electric Co Ltd | 回転電機のギャップ測定用ファンシールド点検穴カバー |
JP2006180655A (ja) * | 2004-12-24 | 2006-07-06 | Toshiba Corp | 車両用全閉形主電動機 |
JP2009153323A (ja) * | 2007-12-21 | 2009-07-09 | Nishishiba Electric Co Ltd | 回転電機 |
EP2600504B1 (en) * | 2010-07-28 | 2015-08-19 | Mitsubishi Electric Corporation | Totally-enclosed fan-cooled motor |
JP2012100430A (ja) * | 2010-11-02 | 2012-05-24 | Hitachi Ltd | 回転電機 |
JP5977298B2 (ja) * | 2014-09-03 | 2016-08-24 | 東芝三菱電機産業システム株式会社 | 全閉式回転電機 |
JP6336503B2 (ja) * | 2016-03-24 | 2018-06-06 | 東芝三菱電機産業システム株式会社 | ブラシレス回転電機 |
-
2019
- 2019-06-28 US US17/595,863 patent/US11967877B2/en active Active
- 2019-06-28 WO PCT/JP2019/025931 patent/WO2020261561A1/ja active Application Filing
- 2019-06-28 DE DE112019007504.7T patent/DE112019007504T5/de active Pending
- 2019-06-28 JP JP2019552652A patent/JP6725184B1/ja active Active
- 2019-06-28 CN CN201980097450.8A patent/CN113994574A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54139006A (en) | 1978-04-20 | 1979-10-29 | Toshiba Corp | Stator for rotary electric machine |
JPS558294A (en) | 1978-06-07 | 1980-01-21 | Gen Electric | Rotary electric machine |
US4208599A (en) | 1978-06-07 | 1980-06-17 | General Electric Company | Integral composite nozzle-shield assembly for a gas-cooled dynamoelectric machine |
JPS5937864A (ja) | 1982-08-26 | 1984-03-01 | Toshiba Corp | 回転電機 |
JP2016036234A (ja) | 2014-08-04 | 2016-03-17 | 株式会社東芝 | 回転電機 |
US20220247262A1 (en) * | 2019-06-28 | 2022-08-04 | Mitsubishi Electric Corporation | Rotating electric machine |
Non-Patent Citations (2)
Title |
---|
International Search Report (PCT/ISA/210) with English translation and Written Opinion (PCT/ISA/237) dated Aug. 27, 2019, by the Japanese Patent Office as the International Searching Authority for International Application No. PCT/JP2019/025931. |
Office Action dated Sep. 27, 2023, issued in the corresponding Chinese Patent Application No. 201980097450.8, 10 pages including 3 pages of English Translation. |
Also Published As
Publication number | Publication date |
---|---|
WO2020261561A1 (ja) | 2020-12-30 |
DE112019007504T5 (de) | 2022-04-14 |
US20220247262A1 (en) | 2022-08-04 |
CN113994574A (zh) | 2022-01-28 |
JP6725184B1 (ja) | 2020-07-15 |
JPWO2020261561A1 (ja) | 2021-09-13 |
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Owner name: MITSUBISHI ELECTRIC CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KODERA, DAIKI;REEL/FRAME:058253/0981 Effective date: 20210927 |
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